100% Natural - Not treated in any way.
Rare Collectors Gem.
Suitable for Museums,Institutions and Students of Gemology.
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Gem with High Luster and Good Clarity.
Refractive Index: 1.628 - 1.647
Hardness: 7 - 7.5
Chemical Comp: Al2SiO5
Density: 3.13 - 3.21
Crystal Group: Orthorhombic
Andalusite is named after Andalusia, the province of Spain where it was first discovered.Andalusite comes in a mix of Red and Green and is pleochroic; it is extremely difficult to cut - to orient the gem to get a pleasing mix of Red Orange and Green which are present in the gem.